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Costs Incurred for Property Acquisition, Exploration and Development (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Acquisitions: |  |  |  |  |  |
Acreage purchases | [1] | $ 4,061 |  |  | $ 57,324 |
Development | [1] | 124,180 |  |  | 666,984 |
Gas gathering facilities: |  |  |  |  |  |
Development | [1] | 2,047 |  |  | 3,583 |
Subtotal | [1] | 137,365 |  |  | 764,574 |
Asset retirement obligations |  | 1,250 | [1] | $ 1,532 | 11,193 | [1]
Total costs incurred | [1] | 138,615 |  |  | 775,767 |
Expense |  |  |  |  |  |
Exploration: |  |  |  |  |  |
Exploration costs incurred | [1] | 6,747 |  |  | 35,117 |
Stock-based compensation expense | [1] | $ 330 |  |  | $ 1,566 |
[1] | Includes costs incurred whether capitalized or expensed.

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